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Siemens HJX3B350 - Molded Case Circuit Breaker 350A 600V 3-Pole

Siemens
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Siemens HJX3B350 is a VL Series molded case circuit breaker designed for thermal magnetic protection in industrial power distribution systems. This three-pole, 350A unit operates at 600VAC with a 65kA interrupting capacity at 480V, providing LI (Long-Time and Instantaneous) trip functions for overload and short-circuit protection. The JG Frame breaker features a bolt-on connection and weighs 45 lb, constructed without integrated lugs for field-configurable wiring. It complies with applicable UL and NEMA standards for industrial electrical safety. Typical applications include main or feeder protection in switchboards, panelboards, and industrial control panels requiring high fault current handling.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic, LI Trip
  • Voltage Rating: 600V AC
  • Current Rating: 350A
  • Dimensions: JG Frame Size
  • Standards: UL, NEMA
  • Applications: Industrial power distribution, switchboards, panelboards
  • Switch Type: Circuit Breaker
  • Configuration: 3-Pole, 3-Phase
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: Standard industrial
  • Shipping Dimensions: Standard JG frame
  • Phase: 3
  • Voltage: 600V
  • Amperage: 350A
  • AIC rating: 65kA@480V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: JG Frame
  • Trip Type: Thermal Magnetic
  • Panel Type: Industrial
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: Standard
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Bolt-On
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 350A
  • Dist Voltage: 600V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 350A
  • Full Load Amp Minimum: 350A
  • Enclosure: Open
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not included
  • Amperage Maximum: 350A
  • Amperage Minimum: 350A
  • Nema Rating: Standard
  • Switch Style: Circuit Breaker
  • Wire Size: Not specified
  • Certification: UL
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Bolt-On
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Standards: UL, NEMA
  • Compatible Frames: JG Frame
  • Installation Type: Panelboard/Switchboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: JG
  • Current Rating: 350A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not specified
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: Standard
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 078364360897
  • GTIN: 00783643608979